<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
export default {
  name: 'Scroll',
  props: {
    probeType: {
      type: Number,
      default: 0
    },
    pullUpLoad: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      scroll: null
    }
  },
  mounted() {
    this.initScoll()
  },
  methods: {
    initScoll() {
      this.scroll = new BScroll(this.$refs.wrapper, {
        probeType: this.probeType,
        pullUpLoad: this.pullUpLoad,
        scrollY: true,
        click: true
      })
      // * 监听滚动时事件
      if (this.probeType === 2 || this.probeType === 3) {
        this.scroll.on('scroll', position => this.$emit('scroll', position))
      }
      // * 监听上拉加载更多
      this.pullUpLoad &&
        this.scroll.on('pullingUp', () => this.$emit('pullingUp'))
    },
    scrollTo(x, y, time = 500) {
      this.scroll && this.scroll.scrollTo(x, y, time)
    },
    finishPullUp() {
      this.scroll && this.scroll.finishPullUp()
    },
    refresh() {
      this.scroll && this.scroll.refresh()
    },
    getScrollY() {
      return this.scroll ? this.scroll.y : 0
    }
  }
}
</script>

<style scoped></style>
